Uros IV of Serbia

Uros IV "the Strong" of Serbia (1308-20 December 1355) was the King of Serbia from 1331 to 1355, succeeding Uros III of Serbia and preceding Uros V of Serbia.

Biography
Stefan Uros was born in 1308 to the House of Nemanjic, a dynasty of Orthodox Christian Serbians. On 8 September 1331 he succeeded his father King Uros III of Serbia as king of the Serbian Kingdom, and during his reign he conquered much of southeast Europe from the Byzantine Empire, such as Epirus, Acarnania, and Thessaly in 1338. Uros, nicknamed "the Strong", made plans to conquer Constantinople next, but the Byzantines called on their Ottoman Empire allies to help in defeating Uros, whose lands in Thrace were sacked. On 16 April 1346 he created the Serbian Empire, and he died in 1355. His son Uros V of Serbia would be nicknamed "the Weak", and the Serbian kingdom would fall in 1389 to the Ottomans.